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Read Contract
Write Contract
- Contract name:
- DSToken
- Optimization enabled
- false
- Compiler version
- v0.5.12+commit.7709ece9
- EVM Version
- petersburg
- Verified at
- 2021-10-28T05:02:03.127440Z
Constructor Arguments
000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000045644475400000000000000000000000000000000000000000000000000000000
Arg [0] (string) : VDGT
Contract source code
pragma solidity >=0.4.23;
contract DSMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, "ds-math-add-overflow");
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, "ds-math-sub-underflow");
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
}
function min(uint x, uint y) internal pure returns (uint z) {
return x <= y ? x : y;
}
function max(uint x, uint y) internal pure returns (uint z) {
return x >= y ? x : y;
}
function imin(int x, int y) internal pure returns (int z) {
return x <= y ? x : y;
}
function imax(int x, int y) internal pure returns (int z) {
return x >= y ? x : y;
}
uint constant WAD = 10 ** 18;
uint constant RAY = 10 ** 27;
//rounds to zero if x*y < WAD / 2
function wmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
//rounds to zero if x*y < WAD / 2
function rmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), RAY / 2) / RAY;
}
//rounds to zero if x*y < WAD / 2
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, WAD), y / 2) / y;
}
//rounds to zero if x*y < RAY / 2
function rdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, RAY), y / 2) / y;
}
// This famous algorithm is called "exponentiation by squaring"
// and calculates x^n with x as fixed-point and n as regular unsigned.
//
// It's O(log n), instead of O(n) for naive repeated multiplication.
//
// These facts are why it works:
//
// If n is even, then x^n = (x^2)^(n/2).
// If n is odd, then x^n = x * x^(n-1),
// and applying the equation for even x gives
// x^n = x * (x^2)^((n-1) / 2).
//
// Also, EVM division is flooring and
// floor[(n-1) / 2] = floor[n / 2].
//
function rpow(uint x, uint n) internal pure returns (uint z) {
z = n % 2 != 0 ? x : RAY;
for (n /= 2; n != 0; n /= 2) {
x = rmul(x, x);
if (n % 2 != 0) {
z = rmul(z, x);
}
}
}
}
interface DSAuthority {
function canCall(
address src, address dst, bytes4 sig
) external view returns (bool);
}
contract DSAuthEvents {
event LogSetAuthority (address indexed authority);
event LogSetOwner (address indexed owner);
}
contract DSAuth is DSAuthEvents {
DSAuthority public authority;
address public owner;
constructor() public {
owner = msg.sender;
emit LogSetOwner(msg.sender);
}
function setOwner(address owner_)
public
auth
{
owner = owner_;
emit LogSetOwner(owner);
}
function setAuthority(DSAuthority authority_)
public
auth
{
authority = authority_;
emit LogSetAuthority(address(authority));
}
modifier auth {
require(isAuthorized(msg.sender, msg.sig), "ds-auth-unauthorized");
_;
}
function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
if (src == address(this)) {
return true;
} else if (src == owner) {
return true;
} else if (authority == DSAuthority(address(0))) {
return false;
} else {
return authority.canCall(src, address(this), sig);
}
}
}
contract DSToken is DSMath, DSAuth {
bool public stopped;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
string public symbol;
uint8 public decimals = 18; // standard token precision. override to customize
string public name = ""; // Optional token name
constructor(string memory symbol_) public {
symbol = symbol_;
}
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
event Mint(address indexed guy, uint wad);
event Burn(address indexed guy, uint wad);
event Stop();
event Start();
modifier stoppable {
require(!stopped, "ds-stop-is-stopped");
_;
}
function approve(address guy) external returns (bool) {
return approve(guy, uint(-1));
}
function approve(address guy, uint wad) public stoppable returns (bool) {
allowance[msg.sender][guy] = wad;
emit Approval(msg.sender, guy, wad);
return true;
}
function transfer(address dst, uint wad) external returns (bool) {
return transferFrom(msg.sender, dst, wad);
}
function transferFrom(address src, address dst, uint wad)
public
stoppable
returns (bool)
{
if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
require(allowance[src][msg.sender] >= wad, "ds-token-insufficient-approval");
allowance[src][msg.sender] = sub(allowance[src][msg.sender], wad);
}
require(balanceOf[src] >= wad, "ds-token-insufficient-balance");
balanceOf[src] = sub(balanceOf[src], wad);
balanceOf[dst] = add(balanceOf[dst], wad);
emit Transfer(src, dst, wad);
return true;
}
function push(address dst, uint wad) external {
transferFrom(msg.sender, dst, wad);
}
function pull(address src, uint wad) external {
transferFrom(src, msg.sender, wad);
}
function move(address src, address dst, uint wad) external {
transferFrom(src, dst, wad);
}
function mint(uint wad) external {
mint(msg.sender, wad);
}
function burn(uint wad) external {
burn(msg.sender, wad);
}
function mint(address guy, uint wad) public auth stoppable {
balanceOf[guy] = add(balanceOf[guy], wad);
totalSupply = add(totalSupply, wad);
emit Mint(guy, wad);
}
function burn(address guy, uint wad) public auth stoppable {
if (guy != msg.sender && allowance[guy][msg.sender] != uint(-1)) {
require(allowance[guy][msg.sender] >= wad, "ds-token-insufficient-approval");
allowance[guy][msg.sender] = sub(allowance[guy][msg.sender], wad);
}
require(balanceOf[guy] >= wad, "ds-token-insufficient-balance");
balanceOf[guy] = sub(balanceOf[guy], wad);
totalSupply = sub(totalSupply, wad);
emit Burn(guy, wad);
}
function stop() public auth {
stopped = true;
emit Stop();
}
function start() public auth {
stopped = false;
emit Start();
}
function setName(string memory name_) public auth {
name = name_;
}
}
Contract ABI
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DSAuthority"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setName","inputs":[{"type":"string","name":"name_","internalType":"string"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"setOwner","inputs":[{"type":"address","name":"owner_","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"start","inputs":[],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"stop","inputs":[],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"stopped","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"wad","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"src","internalType":"address"},{"type":"address","name":"dst","internalType":"address"},{"type":"uint256","name":"wad","internalType":"uint256"}],"constant":false}]
Deployed ByteCode
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